Hey there! Velociraptor is by far the best common dinosaur in game. But she is not the best dinosaur in game in general. You will want to improve your team with more levels, different dinosaurs with more rarities, etc. For that, you will need lots of dna, so don’t be afraid to go and fill your team slots. The random draws are also part of what makes battle so exciting! You never know what you will get.
For low level dinosaurs, here is my advice. Velociraptor, tarbosaurus, nundasuchus, parasaurolophus, tanycolagreus, stegosaurus, euoplocephalus, apatosaurus. I’d say those are the 8 best common dinosaurs. Then you will start improving your team with rares and epics.
More pieces of advice: don’t level up nundasuchus or einiasaurus over level 5, at that point you want to keep collecting their DNA and use it for one of the best rares in game: their hybrid einiasuchus. Avoid dinosaurs like sarchosuchus or iguanodon all together, they are just bad. And for your team, just try different dinosaurs until you find what works best for you